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17-09-2025 19:43

Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sphÃ

18-09-2025 08:35

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

17-09-2025 16:14

Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

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Pyreno on Fraxinus excelsior.
Per Marstad, 16-03-2019 18:39
Per MarstadI found this to-day, in Norway.
On the bark of Fraxinus, small, ca 1 mm.
Konidia 25 - 28 x 12 my.
It is nice with a name.
Per.
  • message #56852
  • message #56852
Chris Yeates, 16-03-2019 18:50
Chris Yeates
Re : Pyreno on Fraxinus excelsior.
Viktorie Halasu, 16-03-2019 21:20
Viktorie Halasu
Re : Pyreno on Fraxinus excelsior.
Dear Chris,

I'd like to ask, what's the difference between Macrophoma fraxini and Diplodia fraxini (or rather D. mutila, without brown conidia)? 
Thank you in advance.

Viktorie

https://www.researchgate.net/publication/260591572_The_complex_of_Diplodia_species_associated_with_Fraxinus_and_some_other_woody_hosts_in_Italy_and_Portugal
Chris Yeates, 16-03-2019 21:29
Chris Yeates
Re : Pyreno on Fraxinus excelsior.
They may represent the same thing as far as I know. "Coelomycetes" can be a taxonomic minefield, crying out for more molecular work.
Viktorie Halasu, 16-03-2019 21:39
Viktorie Halasu
Re : Pyreno on Fraxinus excelsior.
Yes, there's also a paper "Relationship of Macrophoma and Diplodia" (1904) by J.T.Emerson who obtained both types of conidia from a single pycnidium. That's why I was asking, to see if there's a molecular work on them. 

By the way, my collections identified as Diplodia (fraxini or mutila, I'm still not sure how to distinguish them without dark brown conidia abundantly present) released a pigment into water or KOH mount, hyaline in visible light, but bluegreen in UV 365 nm. (The dark blue background is an artifact, I probably forgot to use UV filter.)

Correction: the UV+ water-soluble pigment it's actually not from the fungus, but from upper layer of Fraxinus bark. :-/ Sorry for not checking that before.
  • message #56865